<html>

<head>
<style type="text/css">
body
{
background-color:yellow;
}
h1
{
background-color:#00ff00;
}
p
{
background:rgb(255 ,  0,  255 );
}
span
{
background-color:green;
}
</style>
</head>

<body>
<h1>This is heading 1</h1>
<p>This is a paragraph.</p>
<span style="background: rgb(255, 0, 255);">This is a span</span>
</body>

</html>